Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Navigation
Guide That Contains This Content
[+] Expand All
[-] Collapse All

    Redundant Power Supplies Overview

    Inspect redundant power supplies to ensure that they distribute power to the other router components according to their voltage requirements.

    With redundant power supplies, two power supplies are installed in a router and perform load sharing during normal operation. When one power supply fails or is switched off, the other power supply immediately and automatically assumes the entire electrical load. Table 1 lists some router characteristics for each M Series router platform type.

    The power supplies are internally connected to the midplane, which delivers the power input from the circuit breaker box and distributes the different output voltages produced by the power supplies to the router’s components, depending on their voltage requirements.

    Table 1: Router Power Supply Characteristics per Routing Platform

    Power Supply Characteristic

    M5/ M10

    M7i/
    M10i

    M20

    M40

    M40e

    M120

    M160

    M320

    T320

    T640/ T1600

    TX Matrix/TX Matrix Plus

    Number. of power supplies

    2

    2/4

    2

    2

    2

    2

    2

    4

    2

    2

    2

    Watts per AC/DC power supply

    434 W

    AC
    293 W DC

    DC 293 W

    750 W

    1500 W

    AC 2900 W

    DC 3000 W

    AC 2100 W

    DC 2100 W

    DC original
    2600 W

    DC enhanced 3200 W

    AC 1750 W

    DC 2000 W

    3200 W

    DC enhanced 3200 W

    6500W/ 8616 W

    DC enhanced 3200 W

    DC 4560 W

    DC 9200 W

    Supports both AC and DC power supplies

    Yes

    Yes

    Yes

    Yes

    Yes

    Yes

    No; original or enhanced DC only

    Yes

    No;
    DC only

    No;
    DC only (T640)

    Yes (T1600)

    No
    DC only

    For more information about checking for power supply alarms, see Checking for Power Supply Alarms.

    Published: 2012-08-20